I've never been stung and I own 2 Volitans. However, the sting can range from feeling like a severe bee sting all the way to unconsciousness. Unless the person was allergic, there have been no deaths recorded due to lionfish stings. Even if you feel like you're dying! The treatment is to immerse the stung area in the hottest water you can tolerate for at least 20 minutes. Seeking medical attention would be prudent, but most likely not a requirement. Best practice would be to avoid getting stung in the first place. Respect the fish and its' environment and you'll be fine.